✨ Best Answer ✨
積の微分
(acosΘ+a²)'sinΘ+(acosΘ+a²)sinΘ'
=(-asinΘ)sinΘ+(acosΘ+a²)cosΘ
=-asin²Θ+acos²Θ+a²cosΘ
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ありがとうございました🙇♀️